30547428 has 12 divisors (see below), whose sum is σ = 71277360. Its totient is φ = 10182472.

The previous prime is 30547423. The next prime is 30547457. The reversal of 30547428 is 82474503.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (30547423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1272798 + ... + 1272821.

It is an arithmetic number, because the mean of its divisors is an integer number (5939780).

Almost surely, 2^30547428 is an apocalyptic number.

It is an amenable number.

30547428 is an abundant number, since it is smaller than the sum of its proper divisors (40729932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30547428 is a wasteful number, since it uses less digits than its factorization.

30547428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2545626 (or 2545624 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 30547428 is about 5526.9727699709. The cubic root of 30547428 is about 312.6018543719.

The spelling of 30547428 in words is "thirty million, five hundred forty-seven thousand, four hundred twenty-eight".